NOTES ON TELEOSTEAN OVA AND LARVAE. 



49 



part and has yellow associated with it, Dorsally there is only one, 

 relatively small, black chromatophore, accompanied by yellow, opposite 

 the large mid-post-anal one of the ventral row. This dorsal pigment 

 is often lacking entirely. The notochord is unicolumnar. The pectoral 

 fins are rather large, extending to about the middle of the swim- 

 bladder. The embryonic dorsal fin arises above their base. There is 

 a short pre-anal fin commencing below the gastric dilation. A 

 brownish gall-bladder is visible. At the age of five or six days the 

 ventral post-anal pigment appears to have concentrated itself more in 

 the central part of the post-anal region and in the hypural part, but 

 otherwise the pigment remains as in the early stages. Embryonic fin- 

 rays have developed in the position of the second dorsal and the anal 

 fin and a hypural lobe has formed. 



Lepadogastcr himacnlatus, Donov, Doubly spotted Sucker. 



The eggs and newly hatched larva of this species have previously 

 been described by Holt (11a, p. 447, PI. XLA'II, Figs. 1 to 7), but as all 

 my observations have shown certain differences from the specimens he 

 describes it will be well to give some details from my records. 



My observations were first undertaken chiefly with a view to 

 getting a knowledge of the early post-larval forms for the purpose of 

 comparison with pelagic Lepadogaster fry taken in our young-fish 

 trawl. The following are brief particulars as to the capture of 

 specimens of the eggs of this species which came under my notice in 

 the summer of 1909 : — 



On 14th June a female Lepadogaster hiniaculatus, with spent, flaccid 

 and membranous ovaries, was taken in a Lutraria valve, within wliich 

 a batch of eggs had been deposited, but which had disappeared, leaving 

 traces of their former presence in the form of oval impressions. The 



>'EW SEKIES. — VOL. IX. NO. 1. OCTOISEK, 1910. D 



